How far should sources of ignition, like cigarettes, be kept away from the filling procedure?

The recommended safe distance for sources of ignition, such as cigarettes or open flames, during the filling procedure of LP gas tanks is typically established as 25 feet. This distance is crucial for maintaining safety standards and minimizing the risk of fire or explosion, given that LP gas is highly flammable.

Keeping ignition sources at least 25 feet away helps ensure that any potential gas leak will not reach a flame or spark that could ignite the gas. It's a common safety measure in handling flammable materials to create a buffer zone, and adherence to this distance is a key aspect of safe LP gas filling operations.

While options like 20, 30, and 15 feet may vary in safety protocols across different guidelines, the specific requirement of 25 feet is based on industry best practices aimed at risk reduction.